I have two codes read coil failure on 1 and 3

ANONYMOUS

2005 FORD ESCAPE

162,000 MILES

I have two codes read coil failure on 1 and 3. I replaced the plugs and coils and the car still misfires and reades the same codes after it runs for a minute or two, any suggestions? I don't have sufficated tools the shops have no alot of money, I just need to fix this problem less costly as possible.